http://www.gpsvisualizer.com 
Convert your GPS data for use in Google Earth
http://www.gpsvisualizer.com/map?form=googleearth
The above linked page will allow you to import your GPS data file, or plain-text data (tab-delimited or CSV), and create a KML file that you can then view in the Google Earth application.
 
Convert your GPS data for use in Google Map
http://www.gpsvisualizer.com/map?form=google